error[E0061]: this function takes 1 argument but 2 arguments were supplied --> $DIR/issue-4935.rs:5:13 | LL | fn main() { foo(5, 6) } | ^^^ - argument of type `{integer}` unexpected | note: function defined here --> $DIR/issue-4935.rs:3:4 | LL | fn foo(a: usize) {} | ^^^ -------- help: remove the extra argument | LL | fn main() { foo(5) } | ~~~~~~ error: aborting due to previous error For more information about this error, try `rustc --explain E0061`.